package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @author with葡萄成熟时
 * @version 1.0
 */

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private JwtProperties jwtProperties;
    @Autowired
    private WeChatProperties weChatProperties;

    public UserLoginVO login(UserLoginDTO userLoginDTO) {
        //请求参数封装
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("grant_type", "authorization_code");
        map.put("js_code", userLoginDTO.getCode());
        //调用工具类，向微信接口服务发送请求
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        //解析json字符串
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        log.info("微信用户的openid为：{}", openid);
        //
        if (openid ==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //根据openid查询用户信息
        User user = userMapper.getByOpenid(openid);

        //
        if (user == null){
            user = new User();
            user.setOpenid(openid);
            user.setCreateTime(LocalDateTime.now());
            userMapper.insert(user);

        }






        //生成一个jwt令牌
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID, user.getId());
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(), claims);
        //生成面对前端的VO对象
        UserLoginVO userLoginVO = new UserLoginVO();
        userLoginVO.setToken(token);
        userLoginVO.setOpenid(user.getOpenid());
        userLoginVO.setId(user.getId());

        return userLoginVO;
    }
}
